I too bought a Cambridge Science tablet from Quality Stores. in side two weeks the power supplied exploded, which they replaced. then after 5 months the sound card gave up an ceased to work. Amazon washed theirs hands off it and surprise surprise Quaity Stores are ignoring my e-mail. and now I find out they are still on Amazon and have change the shop front name to Android Tablets UK. Avoid this company, supplier like the plague.